<template>
  <div>
    <p :class="{ active: isH }">1234</p>
    <p :class="['a', 'b', 'c']">1234</p>
    <p :style="{ color: red }">5678</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      isH: true,
      red: "blue",
    };
  },
};
</script>

<style>
.active {
  color: red;
}
</style>